High Power Microwaves

Swegle, John A.; Schamiloglu, E.; Benford, James

doi:10.1201/9781420012064

Cited by 744 publications

(351 citation statements)

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“…The virtual cathode oscillators have been built in two basic geometries. In one configuration, the microwave extraction is perpendicular to the electron beam (radial extraction), and the other configuration is axially symmetric, the microwave power is extracted in the same direction as the electron beam (axial extraction) [4,5,7]. The tunability of the radiation frequencies in virtual cathode oscillator can be achieved by changing the anode-cathode gap spacing, cathode dimensions and shape, and anode voltage with respect to cathode voltage [19].…”

Section: Introductionmentioning

confidence: 99%

“…This device is based on a special class of the bremsstrahlung radiation of the relativistic electrons oscillating axially in the electrostatic fields [4,5]. The virtual cathode oscillators have been built in two basic geometries.…”

Section: Introductionmentioning

confidence: 99%

“…Among the several types of pulsed high-power microwave generators, the virtual cathode oscillator has been considered very attractive because of its conceptual and mechanical simplicity, high output power capability [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] and possible wide-bandwidth with frequency tunable characters which make it attractive for applications where the highpower and wide-bandwidth is acceptable. This device is based on a special class of the bremsstrahlung radiation of the relativistic electrons oscillating axially in the electrostatic fields [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…It does not necessarily need the external applied magnetic field, eliminating the magnetic coils and their power supply which greatly saves volume, weight and cost [10]. It has potential to generate microwaves power ranging from few tens of MW up to a few tens GW in the centimeter to millimeter wavelength range [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…The system with a virtual cathode can thus be used to develop new highpower, genuinely high-current relativistic microwave devices. One of the devices of this kind is the virtual cathode oscillator [2][3][4][5]. The high-power microwaves sources are being developed for applications in controlled nuclear fusion plasma heating, high energy particle accelerator, radar, and many other industrial and military.…”

Section: Introductionmentioning

confidence: 99%

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Feasibility Study of Axially- Extracted Virtual Cathode Oscillator

Singh

Kartikeyan

2007

Int J Infrared Milli Waves

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In this paper, we have analyzed the design parameters of the axially -extracted virtual cathode oscillator, which is high-power microwave source based on the concept of the virtual cathode associated with the intense relativistic electrons beam oscillations in the electrostatic potential well. The microwave emission by the virtual cathode oscillator results from both the space and time oscillations of virtual cathode and reflexing electrons trapped in the potential well between the virtual and real cathodes. In the X-band frequency spectrum 700 MW microwave peak power has been obtained analytically by the solid electron beam of 300 kV and 20 kA for feasible design parameters. The analysis has been performed by 2-dimensional, relativistic, electromagnetic particle-in-cell simulation code XOOPIC.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Feasibility Study of Axially- Extracted Virtual Cathode Oscillator

Singh

Kartikeyan

2007

Int J Infrared Milli Waves

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High‐Power Microwave Sources

Prasad

2024

Encyclopedia of RF and Microwave Engineering

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High‐power microwave (HPM) sources are at the heart of an HPM‐directed energy weapons (DEWs) system. Based on recent defense news articles seen in online magazines such as The Warzone , it is becoming more and more apparent that in the future the survival of a nation may depend on its DEW capability. This chapter provides a brief synopsis of a wide range of microwave tubes which are used for the generation of HPM signals. The chapter starts with a brief introduction on DEWs and their applications followed by a discussion on the basic building blocks of an HPM system. The sections that follow contain generalized physics of operation, frequency range, and output power capability of the following HPM tubes: magnetrons, backward wave oscillators (BWOs), klystrons, traveling wave tubes (TWTs), gyrotrons, virtual cathode oscillators (VCOs), magnetically insulated line oscillators (MILOs), transit time oscillators (TTOs), split cavity oscillators (SCOs), and reltrons. Of all the microwave tubes, the magnetron has been discussed in a little more detail because of its rich history. References have been provided for readers who wish to gain further knowledge in each area.

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High‐power Microwave Sources

Prasad

2024

Encyclopedia of RF and Microwave Engineering

View full text Add to dashboard Cite

High‐power microwave (HPM) sources are at the heart of an HPM‐directed energy weapons (DEWs) system. Based on recent defense news articles seen in online magazines such asThe Warzone, it is becoming more and more apparent that in the future the survival of a nation may depend on its DEW capability.This chapter provides a brief synopsis of a wide range of microwave tubes which are used for the generation of HPM signals. The chapter starts with a brief introduction on DEWs and their applications followed by a discussion on the basic building blocks of an HPM system. The sections that follow contain generalized physics of operation, frequency range, and output power capability of the following HPM tubes: magnetrons, backward wave oscillators (BWOs), klystrons, traveling wave tubes (TWTs), gyrotrons, virtual cathode oscillators (VCOs), magnetically insulated line oscillators (MILOs), transit time oscillators (TTOs), split cavity oscillators (SCOs), and reltrons. Of all the microwave tubes, the magnetron has been discussed in a little more detail because of its rich history. References have been provided for readers who wish to gain further knowledge in each area.

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High Power Microwaves

Cited by 744 publications

References 0 publications

Feasibility Study of Axially- Extracted Virtual Cathode Oscillator

Feasibility Study of Axially- Extracted Virtual Cathode Oscillator

High‐Power Microwave Sources

High‐power Microwave Sources

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